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PDF LC78605E Data sheet ( Hoja de datos )
| Número de pieza | LC78605E | |
| Descripción | Compact Disc Player DSP | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENN7735
SANYO Semiconductors
DATA SHEET
CMOS IC
LC78605E Compact Disc Player DSP with
Built-in Microcontroller
Overview
The LC78605E CMOS IC implements the signal processing, servo control, LCD display, button state acquisition, and
remote controller handling required by compact disc players without requiring a separate microcontroller. It provides
the following basic functions: demodulation of the EFM signal from the optical pickup, deinterleaving, error detection
and correction, 8× oversampling audio filters, D/A converter (with built-in analog low-pass filter), LCD display drivers,
key acquisition (A/D) and control processing, and automatic discrimination and playback of CD-RW discs. Thus the
LC78604E is ideal for implementing low-end CD players that support playback of CD-RW discs.
The LC78604E also provides a radio tuner frequency display function, and allows digital display of the selected
frequency in manual tuning CD radio/cassette players.
Functions
• Implements the CD play/pause, stop, track selection, fast forward/fast rewind, repeat 1/repeat all, program
setup/play/clear for up to 30 tracks, and shuffle play functions controlled from CD player buttons.
<Signal-Processing Block>
• The signal-processing block applies slicing at the correct level to the input HF signal, and converts that signal to an
EFM signal. At the same time it generates a PLL clock signal with an average frequency of 4.3218MHz by
comparing the phase with that of the internal VCO.
• A reference clock signal and all necessary timings can be generated using an external 16.9344MHz crystal.
• The disc motor speed is controlled by a frame phase difference signal created from the playback clock and the
reference clock.
• Performs frame sync signal detection, protection, and interpolation to assure stable data readout.
• Demodulates the EFM signal and converts the result to 8-bit symbol data.
• Separates the subcode data from the EFM signal and outputs that data to the internal control processing block.
• After applying a CRC check to the subcode Q data, outputs that data to the internal control processing block.
• Buffers the demodulated EFM signal in internal RAM and compensates for up to ±4 frames of jitter due to
fluctuations in the disc speed.
• Applies unscrambling and deinterleaving to the demodulated EFM signal in the stipulated order.
• Performs error detection, correction, and flag processing (C1: double, C2: double).
• Sets the C2 flags according to the C1 flags and the C2 check and applies interpolation and previous value hold
processing to the output signal according to the C2 flags. This interpolation circuit implements 2-value
interpolation. A previous value hold operation is applied if the C2 flags indicate errors for over 2 consecutive
samples.
• The internal control processing block controls the track jump, focus start, disc motor start/stop, muting on/off, track
count, and other operations.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
32504TN (OT) No.7735-1/11
1 page  
Pin Assignment
LC78605E
EFMI
DRF
DEFI
CLK
RWB
RWC
COIN
CQCKB
FSEQ
CLVO
HFL
JPO
TES
TOFF
TGL
DVSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LC78605E
48 DVSS
47 PUIN
46 CLOSE
45 REMOTE
44 FMAMB
43 SEG7
42 SEG6
41 SEG5
40 SEG4
39 SEG3
38 SEG2
37 SEG1
36 COM1
35 COM2
34 COM3
33 COM4
Top view
No.7735-5/11
5 Page 
LC78605E
*: If a current output type pickup is used, the photoreceptor connector must be located as close as possible to the
ASP RF input. If a voltage output type pickup is used, the I/V conversion resistors located at the ASP input must
be located as close as possible to the ASP RF input.
— The EFM signal line must be made as short as possible, and must either be located well away from adjacent lines
or must be run between ground or power supply level lines as shield lines. Since the slice level controller output
(SLCO) can easily introduce noise in the EFM signal line, the resistor connected to the output pin must be located
as close to that pin as possible. Note that if that resistor has a relatively small value, spurious radiation problems
may be aggravated and that if the resistor has a larger value, the output level may become problematic.
— The crystal oscillator circuit must be surrounded by the ground pattern.
— The TUNER pin coupling capacitor must be located as close to the IC as possible.
• Other Notes
If there are any points that are unclear or if you have any questions, contact your Sanyo representative during the
design phase.
This IC is a special-purpose device designed for CD player applications, and has specifications that differ from those
of general-purpose logic devices. End products must be designed to operate in a failsafe manner appropriate for the
application, and application operation must be verified using test equipment.
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of March, 2004. Specifications and information herein are subject to
change without notice.
PS No.7735-11/11
11 Page | ||
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